An apparatus (910) for monitoring movement of a persons eyes is disclosed. The apparatus comprising a device (912) configured to be worn on a persons head, a light source (930, 934) for directing light towards the eyes of the person when the device is worn, first and second image guides (924) comprising first ends (926) fixed on the device, the first image guide positioned for viewing a first eye of the person wearing the device, the second image guide positioned for viewing a second eye of the person wearing the device and a camera (922) coupled to the first and second image guides such that the first and second image guides provide first and second inputs including images of the first and second eyes on an active area of the camera to produce a single output comprising output signals including the images of the first and second eyes.
